>更新时间：2026.07.08

# 微信支付 - 小程序合单支付（普通商户）文档索引

> 小程序合单支付，提供商户在微信小程序中实现将多个商户的订单（普通商户模式只支持2-10笔订单，单笔收款请使用小程序支付）整合为一个订单进行收款的能力。

## 接入指引
- [产品介绍](https://pay.weixin.qq.com/doc/v3/merchant/4012077589.md)
- [常见问题](https://pay.weixin.qq.com/doc/v3/merchant/4013421468.md)
- [开发指引](https://pay.weixin.qq.com/doc/v3/merchant/4012079115.md)
- [开发接入准备](https://pay.weixin.qq.com/doc/v3/merchant/4015765029.md)
- [错误码](https://pay.weixin.qq.com/doc/v3/merchant/4020807046.md)

## API 列表
- [小程序合单下单](https://pay.weixin.qq.com/doc/v3/merchant/4012556931.md)
- [小程序调起支付](https://pay.weixin.qq.com/doc/v3/merchant/4012266109.md)
- [查询合单订单](https://pay.weixin.qq.com/doc/v3/merchant/4013421401.md)
- [关闭合单订单](https://pay.weixin.qq.com/doc/v3/merchant/4013421404.md)
- [合单订单支付成功回调通知](https://pay.weixin.qq.com/doc/v3/merchant/4013421407.md)
- [退款申请](https://pay.weixin.qq.com/doc/v3/merchant/4013421410.md)
- [查询单笔退款（通过商户退款单号）](https://pay.weixin.qq.com/doc/v3/merchant/4013421421.md)
- [发起异常退款](https://pay.weixin.qq.com/doc/v3/merchant/4013421429.md)
- [退款结果回调通知](https://pay.weixin.qq.com/doc/v3/merchant/4013421448.md)
- [申请交易账单](https://pay.weixin.qq.com/doc/v3/merchant/4013421450.md)
- [申请资金账单](https://pay.weixin.qq.com/doc/v3/merchant/4013421456.md)
- [下载账单](https://pay.weixin.qq.com/doc/v3/merchant/4013421461.md)

## 请求示例
- [关闭合单订单 - curl 示例](https://pay.weixin.qq.com/doc/v3/merchant/4013421404-curl.md)
- [关闭合单订单 - Java 示例](https://pay.weixin.qq.com/doc/v3/merchant/4013421404-java.md)
- [关闭合单订单 - Go 示例](https://pay.weixin.qq.com/doc/v3/merchant/4013421404-go.md)
- [发起异常退款 - curl 示例](https://pay.weixin.qq.com/doc/v3/merchant/4013421429-curl.md)
- [发起异常退款 - Java 示例](https://pay.weixin.qq.com/doc/v3/merchant/4013421429-java.md)
- [发起异常退款 - Go 示例](https://pay.weixin.qq.com/doc/v3/merchant/4013421429-go.md)
- [小程序合单下单 - curl 示例](https://pay.weixin.qq.com/doc/v3/merchant/4012556931-curl.md)
- [小程序合单下单 - Java 示例](https://pay.weixin.qq.com/doc/v3/merchant/4012556931-java.md)
- [小程序合单下单 - Go 示例](https://pay.weixin.qq.com/doc/v3/merchant/4012556931-go.md)
- [查询单笔退款（通过商户退款单号） - curl 示例](https://pay.weixin.qq.com/doc/v3/merchant/4013421421-curl.md)
- [查询单笔退款（通过商户退款单号） - Java 示例](https://pay.weixin.qq.com/doc/v3/merchant/4013421421-java.md)
- [查询单笔退款（通过商户退款单号） - Go 示例](https://pay.weixin.qq.com/doc/v3/merchant/4013421421-go.md)
- [查询合单订单 - curl 示例](https://pay.weixin.qq.com/doc/v3/merchant/4013421401-curl.md)
- [查询合单订单 - Java 示例](https://pay.weixin.qq.com/doc/v3/merchant/4013421401-java.md)
- [查询合单订单 - Go 示例](https://pay.weixin.qq.com/doc/v3/merchant/4013421401-go.md)
- [申请交易账单 - curl 示例](https://pay.weixin.qq.com/doc/v3/merchant/4013421450-curl.md)
- [申请交易账单 - Java 示例](https://pay.weixin.qq.com/doc/v3/merchant/4013421450-java.md)
- [申请交易账单 - Go 示例](https://pay.weixin.qq.com/doc/v3/merchant/4013421450-go.md)
- [申请资金账单 - curl 示例](https://pay.weixin.qq.com/doc/v3/merchant/4013421456-curl.md)
- [申请资金账单 - Java 示例](https://pay.weixin.qq.com/doc/v3/merchant/4013421456-java.md)
- [申请资金账单 - Go 示例](https://pay.weixin.qq.com/doc/v3/merchant/4013421456-go.md)
- [退款申请 - curl 示例](https://pay.weixin.qq.com/doc/v3/merchant/4013421410-curl.md)
- [退款申请 - Java 示例](https://pay.weixin.qq.com/doc/v3/merchant/4013421410-java.md)
- [退款申请 - Go 示例](https://pay.weixin.qq.com/doc/v3/merchant/4013421410-go.md)

